Injustice: Gods Among Us‘ Battle Arena has been going on for some time now, all leading to the final four combatants, and who will be going onto the Finals.
(Injustice: Gods Among Us, PS3, Wii U, Xbox 360)

No, they let the fans vote for a winner every week on facebook. It's been going on for quite a while now. Of course it became more about popularity than actual skill so Batman and Superman will be fighting each other in the finale (as everyone predicted weeks ago).